Joulescope frozen - red USB text

Issues
2

Hi @fma21 and welcome to the forum!

First, the indicator light turns yellow or red when samples are being dropped. Both the host software and the device handle this gracefully and return to logging data, just like you observed.

From your description, I am concerned that your Joulescope is not powered sufficiently. Can you confirm that you are connecting your Joulescope’s host USB connector directly to your host computer’s USB port? Please ensure that no hubs or docking stations are between Joulescope and your host computer.

If this does not fix the problem, here are some other things to consider:

  1. When this event occurs, is your host computer doing anything other than running the Joulescope UI? For example, are you controlling the target or power supply using your host computer?

  2. What type of current and voltage step are you injecting? Very fast edges have lots of energy. While we have tested for this, it is possible that it is coupling into the USB side somehow. We never figured out what was going on with this topic: Frequent crashes in 0.6.8 - #4 by mliberty.

  3. If you set your Joulescope to a fixed 10A range and then measure this event, do you see the same sample drop behavior?